Machine for welding chain-links.



L. ROEHR. MACHINE FOR. WELDING 011m: LINKS.

APPLIOATION FILED AUG. 17, 1908.

Patented June 1, 1909.

5 SHEETS-SHEET 1.

L. ROEHR.

MAGHINE FOR WELDING GHAIN LINKS.

APPLICATION FILED AUG. 17, 1908.

Patented June 1,190.9.

5 SHEETS-SHEET 2.

NVENTOR ITNESSES L. ROEHR.

MACHINE FOR WELDING CHAIN LINKS.

APPLIOATION FILED AUG. 17 190B.

Patented June 1, 1909.

5 SHEETS-SHEET 3.

I W TNESSES/a INVENTOR I. r jtlaruey L. ROEHR.

MAGHINE FOR WELDING GQIAIN LINKS.

APPLICATION FILED AUG. 17, 1908- 923,582. Patented June 1, 1909.

5 SHEETS-SHEET 4.

WITNESSES L. ROBHR, MAGHINE FOB WELDING CHAIN LINKS. APPLICATION FILED AUG. l'l, 1908.

Patented June 1, 1909.

5 SHEETS-SHEET 6.

WITNESSES II VVENTOR Altar-nay UNITED STATES PATENT o EIoE.- 1

LOUIS ROEH'R, OF STAMFORD, CONNECTICUT, 'ASSIGNOR TO THE YALE & TOWN E MANUFAC- I TUBING COMPANY, OF STAMFORD, CONNECTICUT.

MACHINE FOR WELDING CHAIN-LINKS.

Applieation filed August 17, 1908. Serial No. 448,896.

Tooll whom it may concern:

Be it known that I, LoUIs RoEIIR, of

I Stamford, in the county of Fairfield and State of Connecticut, have 'invented'certain new and useful Improvements in Machines for Welding Chain-Links; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an'improvement in machines'for welding chain links, and more particularly to improvement on the machine disclosed in Patent 858,758 granted to The vYale & Towne Manufacturing Company, July In the machine disclosed in the patent above referred to, two'dies are carried by reciprocating cross heads, and each die is provided with two lips, one longer than the other. The dies are located in the same vertical plane, with the longer lip of one die in line' with the shorter lip of the other die, and as the dies are moved apart after a blow or compressive stroke, they are turned 1-80 degrees by suitable gearing so as to change the relative positions of the lips of 'the dies. When the dies are first brought together two fins are formed on o posite sides of the link between the lips of t he dies, and as the dies are turned, the tendency of the reversal of the lips of the dies, is to fold the fins produced by the first squeeze or blow, or cut them off,

and by a second or more turns and blows of the dies, to completel obliterate the fins and produce a smooth we d.

It has been found in actual practice, that the longer li s of the dies do most of the shearing, an they have a tendency to distort the hot' link, first in one direction and then in the other, as the dies are turned through 180 degrees, and thus impair the ,2.- e co welded joint.

The object of the present invention is to so constructthe dies that the flash or extruded stock caused by the squeezing action of the press dies, is sheared ed the link simultaneouslliy and uniformly at both sides of the we A further object is to provide a series of pairs of cooperating dies, each pair of the series being brought successively into position to operate on the joint being welded.

With these ends in view my invention consists in the parts and combinations of parts Specification of Letters Patent.

- Patented June 1, 1909.

.and in details of construction as will be more fully explained and pointed out in the claims.

In the accompanyingdrawings, Figure 1 is a view in front elevation showing the upper and lower dies, the machine frame being broken away. Fig. 2 is a view of the same in side elevation, a portion of the lower frame being in section. Fig. 3 is an enlarged view in side elevation of the upper turret, the mechanism for turning same, and a portion of the frame. Fig. 4 is a viewof the lower turret from the side opposite that shown in Fig. 2, a portion of the frame and the shaft bein shown in section. Fig. 5 is a View in side e evation of the turret. Fig. 6 is aview of one of the dies. Fig. 7 is a view of the toothed wheels carrying the pawls. Fig. 8 is a view of the ratchet ring. Fig. 9 is a view of the turret holding disk. Fig. 10 is a view in side elevation of the yielding trip for releasing the turret holding disk and Fig. 11 is a view of the pawl for locking the turret holding disk.

1 represents a frame of any suitable con struction, 2 the up er cross head and 3 the lower cross head, t e two cross heads being located in line as shown in Figs. 1 and 2, and connected up so as to move toward and away from each other in unison, whereby the dies, to be hereinafter described, simultaneously en age the opposite sides of the joint to be we ded, the lower die constituting the anvil and the upper one the hammer.

As the tool holders or turrets and other parts carried by the two cross heads are alike in construction and operation, I willdescribe the lower one in detail and apply the same reference characters to the upper one.

Mounted in the bifurcated upper end of the lower cross head 2 is the shaft 4 carrying the fixed turret 5. This turret comprises a central hub, and four recessed seats 6, the latter being oppositely disposed as shown in Fig. 4, and each is provided with a flat base 7 on which the dies 8 and 8 solidly rest. The recessed seats 6 are open-at one-side, and the dies are secured in place by the bolts 9, passing through the dies and into the side walls of the seats, and are adjusted laterally by the set screws 10 passing through the end walls of the seats 6, and engaging inclined or Wedge shaped sides of the dies. By means of these set screws the dies of the upper and lower turrets may be adjusted laterally to produce a perfect alinement between the upper and lower dies.

The dies 8 of each turret are provided with curved recesses the lips at the sides of the recesses in the dies 8 being longer than those .of the dies 8.; the recesses in the latter dies being lessthan'a' half circle. The two dies 8 are'oppositely disposed in the same plane and the dies 8 are also oppositel disposed in a lane at right angles to the ies 8, and

the 'ies ofthe two turrets are. so arranged that the dies 8 of one turret cooperate with e the dies'8 of the other turret.-

Loosely mounted on theshaft 4, is the wheel 11 shown detached in Fig. 7. This wheel is toothed part wayits peri hery and is provided, with the flange 12, the atter being integral with the wheel or fixed thereto so as to rotate therewith. Pivotally' mounted on pins '13 carried by flange 12, are the pawls 14 the free ends of which. are yieldin ly held in contact with the toothed edge of iiie'ratchet ring 15 by the springs ,16. The ratchet ring 15 is keyed, or otherwise secured-to shaft 4,

so that when the ring is turned by the awls 14, the shaft 4, carrying the turret w' also bet'urned.

Secured to the frame 1 of the. machine,

,with its teeth; in a position to engage the teeth-of wheel 11, is the rackbar 17. The teeth of the ratchet ring and the pawl are so located with relation to the toothed wheel 11, that as the cross head descends the ends B, of the pawl engage the teeth on the ratchetring and move the latter through an arc of ninety'degrees, thus turning the shaft 4 and turret 5, whereas in the ascent of the cross head, the pawls 14 move in the opposite direction over the teeth on ratchet, the shaft and its turret, remaining in the position, to

which'these parts were turned during the operative-position and carrying the next succeeding die up to its operative position.

Secured to shaft 4 at the end farthest removed from the toothed wheel l1, is the I "turret locking disk 18. .This disk is provided on its periphery with four recesses 19 one for each die carried by the turret, which recesses are successively engaged by the toothed end 20 of thedisk holding pawl 21.

This pawl is pivoted at 22 to the front of the .cross head 3, a spring22 being interposed betweenthe cross head and the lower free end of the pawl for holding the upper toothed end of the pawl 21 in contact with the periphery of disk 18.

Pivoted to the frame of the machine adjacent to thepawl 21, is the yielding tripping lever 22 provided at its upper vend with the laterally projecting lip 23 the upper and lower 'faces of which are inclined as shown in Fig.

'lip'ped end of-the lever being limited by the engagement of the lower end of said lever with the frame of the machine. I Normally the tooth 20 of lever 21 rests within a notch 19 of the disk 18, and holds the latter, together with the shaft 4 andturret 5 on the shaft, against movement. Asthe cross head ascends, carrying the die toward the link to be welded, the pin 26 on the lower end of disklocking pawl 21 engages the lower upwardly and outwardly inclined face of thetripping lever 22, thus forcing the upper end of the latter inwardly a ainst the ressure of its spring. As the pin eaves the ip the lever 22 assumes its normal position, with the lip 23 in the ath of downward movement of the pin.. uring this'upward movement of the lower cross head, the pawls '14 ride. over the teeth on ratchet ring 15, thus 4 permitting the toothed wheel 1 1 to be rotated on shaft 4, by its engagement of the wheel with the rack bar 17 uring the descent of the lower cross head the rotation of the toothed wheel 11 by rack bar 17,'carries the pin 26 on'disk holding pawl 21 comes into contact withthe downwardly and rearwardly inclined face'of the lip 23 on lever 22, and as the upper end of lever 22 is prevented from moving outwardly by the engagement of the machine, the lower end of disk holding pawl is necessarily forced inwardly, thus withdrawing the tooth 20 from the notch in the disk 18, and leaving the disk and shaft and all the parts carried by the latter free to be turned by the enga einent of toothed wheel 11 with the rack ar 17 As the pin 26 leaves-the lip 23, the tooth 20 of disk holding pawl 21 moves into contact with the periphcry of disk 18 and drops into the next succeeding recess} and again locks the disk and shaft'4 until the next downward stroke of the cross head. The toothed wheel 11 and rack bar17 are so constructed to impart a quarter turn only to shaft 4, and the arts are so adjusted that when the shaft 4 1s locked by the disk holding pawl 21 one die will be in position to coolperate with the upper die in welding the lin 110 2 lower end of said lever with the frame of the terms upper and lower, used in describingthe location and Operation of the parts carried by the lowercross head, the above'will apply to the upper cross head audits connected parts.

duce the we The two turrets move simultaneously in opposite directions, each is turned while moving in a direction away from the members being welded, and are held againstmovement while moving toward the parts being welded.

In the operation of the machine, the link to be welded is seated on and between the clamps 27 which may be of any preferred form, with the joint to be welded in the plane of the upper and lower welding dies. The dies are so placed that the dies 80f the lower turret coact with the dies 8 of the upper turret The welding heat is. produced by electricity or by any roper means, and while in its heated con ition and clamped, the two abutting ends of the link are forced into contact producing a 'bulge at the joint.

One revolution of the turret, or the action of the four 1pairs of dies is sufficient to reformed onop osite sides of the link above or below the orizontal center of the If the first stroke be with a long lipped die in the upper turret and a short lip e die in the lower turret, the fins will be elow the horizontal center. In their movements away from the link, both turrets will be turned one quarter revolution, and on thenext welding stroke, a long lipped die on the lower turret will coact with a short lipped die on the up or turret; By this means the fins or extru ed stock squeezed'out' by the first dies will be sheared off simultaneously and uniformly at both sides of the link by the next succeeding dies, so that upon the completion of the action of the machine a erfect, and uniform and smooth weld will ave been-formed. a

One advantage in using a plurality of press dies, is in the fact that each die comes in contact with the hot metal only once during a weld, whereby in the machine previously referred to a single pair of dies is used to reduce and shape. the weld. Again with mypresent machine, the dies which first press the weld and receive the most heat, may be simply the roughing dies, while those which follow, may be the finishing dies and be subjected to much less severe service,-

may be employed for reciprocating the cross heads, but it is evident that other ower transmitting means may be used an that I wit d. At the first stroke, fins are,

other parts may be altered without departing from the spirit and scope of my inven tion.

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, isz- 1. In a machine for welding, the combina tioi-nwith means for holding the members to be welded, and two reciprocating tool holders located on o posite sides of the holding means each holder carrying a plurality of alternately long and short lip ed dies, the lon lipped dies of one tool ho der coacting t means for arti while the members being welded so as to bring the next succeeding pair of dies into operative position.

2. In a machine for welding the combination with two tool holders each carrying a plurality of long and short lipped dies, the

ong li ped dies of each tool ho der coact' with t e short lipped dies of the other too holder, of means whereby the tool holder may be moved while the dies are out of contact with the members being welded so as to bring the next succeeding pair of dies into operative position. v V

'3. In a welding machine the combination with two reci rocating tool holders one carrying a die aving two long lips and the other carrying a die having two short lips the latter coacting with the long li ed die, of means intermediate the tool hdl ers for holding the members to be welded.

4. In a welding machine the combination with two reciprocating tool holders and a plurality of a ternately arranged long and short li ped dies in each holder, of means for part y rotating the tool holders while the dies are out of contact with the members being welded, and means for locking the tool holders during the forming stroke of the dies.

5. In a welding machine, the combination with reciprocating cross heads, a shaft cary rotating the tool holders ried by each, a turret fixed to each shaft and a luralit of alternately arr ed 10 and shgrt lip'pid dies carried by ih tul r et, of means for rotating the shafts, means for locking the shafts, and means for disengaging thelocking means so as to permit the shafts to be rotated once during each complete forming stroke.

6. In a welding machine the combination e short allipped dies of-the other, of.

'es are out of contact with the with a frame and means carried thereby for supporting the members to be welded, of two reciprocating cross heads mounted in the frame on opposite sides of said supporting means, a shaft carried by each cross head, a toothed wheel loose on each shaft, a fixed rack bar for each toothed wheel, a pawl carried by each wheel, a ratchet ring carried by each shaft, each ling being enwith a reciprocating tool holder, a locking disk fixed with relation to the tool holder and means for imparting a part rotation to the tooLholder once during each welding stroke, of a yielding pawl engaging the looking diskfor holding the -too holder against movement, and a yielding tripping lever 'for moving the pawl out of engagement with the locking lever just prior to the rotation of the tool holder.

In testimony whereof, I have signed this specification in the presence of two subscribmg witnesses.

LOUIS ROEHR.

Witnesses:

SCHUYLER MERRITT,

F. G. HALDY. 

